Helical permanent magnet structure and undulator using the same
AssigneeNational Synchrotron Radiation Research Center
InventorsCheng-Ying Kuo, Cheng-Hsing Chang, Cheng-Hsiang Chang
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Abstract
A helical permanent magnet structure includes at least one magnet assembly. The magnet assembly includes a plurality of permanent magnets and poles. The permanent magnets are with a magnetization direction, and formed as helical shape and arranged as a helical surface, the center of the helical surface has a longitudinal passage for being passed through by a charged particle. The poles are with the same amount of the permanent magnets, wherein the poles are magnetized by the permanent magnets and absorb on one side of the permanent magnets.
Claims14
A helical permanent magnet structure, comprising:
- at least one magnet assembly, comprising:
- a plurality of permanent magnets with a magnetization direction, the permanent magnets being formed as helical shape and arranged as a helical surface, and the center of the helical surface having a longitudinal passage for being passed through by a charged particle;
- and
- a plurality of poles with the same amount of the permanent magnets, wherein the poles are magnetized by the permanent magnets and absorb on one side of the permanent magnets;
- and
- an inner frame surrounding outside and limiting the magnet assembly,
- wherein the magnet assembly further comprises a plurality of positioning members, and the permanent magnets and the poles are positioned in the inner frame.
Dependencies are inferred from the claim text.